GLOW PLUG CONTROL DRIVE METHOD AND GLOW PLUG DRIVE CONTROL SYSTEM
First Claim
1. A method of controlling the driving of a glow plug in a glow plug drive control system which enables driving to energize the glow plug, the system comprising:
- a glow switch, a stabilizing coil, and a glow plug that are series-connected, a battery voltage being applied to one end of the glow switch, another end of the glow plug being connected to a ground; and
an electronic control unit that controls the opening and closing of the glow switch,the method comprising;
performing opening and closing of the glow switch, with a repetition frequency of PWM signals, that control the opening and closing of the glow switch, a higher frequency than a repetition frequency in a normal drive state upon commencement of the driving of the glow plug, andreturning the repetition frequency of the PWM signals to the frequency during normal driving when a predetermined drive shift condition has been met.
1 Assignment
0 Petitions
Accused Products
Abstract
To suppress current fluctuations upon commencement of driving and prolong lifespan by reducing electric stress caused by current fluctuations.
A glow plug 1, a glow switch 2, and a stabilizing coil 3 are series-connected, and upon commencement of the driving of the glow plug 1, a repetition frequency of PWM signals that control the opening and closing of the glow switch 2 is made into a higher frequency than a repetition frequency in a normal drive state and the opening and closing of the glow switch 2 is controlled (S104), and when a predetermined drive shift condition has been met (S106), the repetition frequency of the PWM signals is returned to the frequency during normal driving and the opening and closing of the glow switch 2 is controlled (S108), whereby the current upon commencement of driving is smoothed and the occurrence of an instantaneous large current is suppressed.
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Citations
10 Claims
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1. A method of controlling the driving of a glow plug in a glow plug drive control system which enables driving to energize the glow plug, the system comprising:
- a glow switch, a stabilizing coil, and a glow plug that are series-connected, a battery voltage being applied to one end of the glow switch, another end of the glow plug being connected to a ground; and
an electronic control unit that controls the opening and closing of the glow switch,the method comprising; performing opening and closing of the glow switch, with a repetition frequency of PWM signals, that control the opening and closing of the glow switch, a higher frequency than a repetition frequency in a normal drive state upon commencement of the driving of the glow plug, and returning the repetition frequency of the PWM signals to the frequency during normal driving when a predetermined drive shift condition has been met. - View Dependent Claims (2, 3, 4, 5)
- a glow switch, a stabilizing coil, and a glow plug that are series-connected, a battery voltage being applied to one end of the glow switch, another end of the glow plug being connected to a ground; and
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6. A glow plug drive control system which enables driving to energize a glow plug, the system comprising:
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a glow switch, a stabilizing coil, and a glow plug that are series-connected, a battery voltage being applied to one end of the glow switch, another end of the glow plug being connected to a ground; and an electronic control unit that controls the opening and closing of the glow switch, wherein the electronic control unit is configured in such a way that, upon commencement of the driving of the glow plug, it can make a repetition frequency of PWM signals that control the opening and closing of the glow switch a higher frequency than a repetition frequency in a normal drive state and control the opening and closing of the glow switch and, when it has been determined that a predetermined drive shift condition has been met, it can return the repetition frequency of the PWM signals to the frequency during normal driving and control the opening and closing of the glow switch. - View Dependent Claims (7, 8, 9, 10)
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Specification